Record changing phonographs



H. C. HANSEN I RECORD CHANGING PHONOGRAPHS Jane 23, 1959 z sneets-she'etOriginal Filed May 12, 1951 HANS CHR\$TIRN HANSEN,

HIS A T7 ORNE Y.

June 23, 1959 1-1 c. HANSEN 1,

' RECORD cmmcmc PHONOGRAPHS Original Filed May 12', 1951 2 Sheets-Sheet2 HANS CHRISHAN "mam;

Hi5 ATTORNEY.

2,391,409. iincoan CHANGING PHoNoG Arns Hans Christian Hansen,Klanlpenborg, Denmarh ()rigl l l i v application May 12, 1951, SerialNo. 225,9 t6 Divided and this application December 27, 1957, Serial No,705,629

Claims priority, applicationDenmark March 27, 1951 20 Claims, c 74?200)The present application is adivisional application of my applicationSer. No. 22 5,9 46.filed May 12, 19 51 and relates to phonograph drivingmechanisms for driving a phonograph turntable at a plurality ofpredetermined speeds.

It is an object of the invention to provide a driving arrangement thatenables the turntable to be driven at a constant speed with littledeviation from the nominal speed and which therefore will be suitablefor high fidelity reproduction.

A further object of-the invention is to provide a phonograph drivingarrangement for driving the phonograph turntable at a plurality ofpredetermined speeds in which a driving pulley is arranged independentof the turntable and in which the driving unit includesa driving beltthat passes round the turntable and the driving pulley.

A further object of the invention is to provide a driving arrangementincluding an elastic belt and in which the elastic belt can bedimensioned to absorb a substantial part of the irregularities so as tothereby obtain a decrease of the so-called wow.

Further objects and advantages of my invention will appear from thefollowing specification, in which the invention is now described withreference to the accompanying drawing, in which Figure l is aperspective View, partly in section, Of 3 phonograph driving arrangementaccording to the. invention,

Figure 2 is an exploded perspective view of the motor driving mechanism,and V Figure 3 is n od eta l- Of the. meter dr mechanism.

In Figure 1, 9 is a chassis plate of a phonograph having turntable 1tata 1Y su brte n a m nne not nh tu nt bl h s a. Periph ral fl n e. ptqid d with an exterior anr alar recess 15 so as t9 give the turna l h hracte a la Pu e wh ch is driven by means of an a i t24 f 9;n a d ivi P11Y Th a n eme t s, m r pecifi a y haw n E br 2- Pu l 2 i t ata su por eon. a p ndle 18 which so sup rts a fr bt b sear whee .0. a ted to age ne dr en from a PW s ind of an l ct b m e: 1.9 whic i no shown n d ta hdr in mechani m s b de cr d hereinafte is constructed so as to enablethe. turntable to be rotated th a s ected on at t e ifl ent p e e e m npe ds o his ur qse he m tor pind e: i P vid w h ee ssb i 1. .1 .42514.16 of i ferent d a ete p e to e select n ed by th fi t wheel whichcan. b x a d s l ced,

In p e r latie sh o a d ubstant all para e with the spindle 19 and thespindle 18a further spindle 3.4, is mounted on a motor base plate 56having holes or the like 37 for mounting the driving mechani rn b lowthe chassis plate 9,. A pair of pins 2,5, 2 8 on the friction wheel 20extends through, holesfin the pulley 22 to couple the friction. wheel21! and the pulley 22'to rotate together. The spindle 18 is mounted onthe free end of an arm 30, and the structure includ ng the frictionwheel 20 and the pulley 22 and the pulley 22 is allowed to -rotatefreely on the spindle 18. The pulley 22 is securedagainst longi tudinaldisplacement relatively to the spindle 18 while the friction wheel 20 ismounted for axially displacement along the spindle 18. i i

The arm 30 is supported on a sleeve 32 which is mounted to turnon the,spindle 34. Behind the sleeve 32 the arm 30 has an extensionffi the endof whichisprovided with a pedestal, 40 which has two upwardly extendingprojections with recessed top ends of which only the front recess 42 isshown; Theserecesses form bearings for oppositely extending projections46 and'48 on the rear endof a pivotable arm 56, the front end of whichis bifurcated and engages in a circular groove 54 on a hub 56 secured tothefriction wheel 2 0fso as to cause axial displacement of the. frictionwheel in response to tilting of the arm 50.

The arm 50 is provided with an apertureSS, Figure 3, having aninwardlydirected cam projection 60, which is adapted to engage a cammember, generally referred to as 6 1 and in the formfoffpdrtionsofanupwardly facing shoulderon thev sleeve 32. Thef sleeve has a top portionof reduced diameter 62, which extends upwardly through the aperture 58and forms spindle for a control knob or the like 6.4 which extendsabovethe top surface of the chassis plate 9, see Figure 1 Between the 50 andthe rear end of the arm 30 a tension spring 66 is provided urgingthe armdownward to engage the projection 69 against the cam 61. The cam 61 iscomposed of two inclined sections 68, and 76 respectively between whicha fiat section 76 isarra ged in a notch, the width ofwhich correspondsto the width ofthe projection 60. At. the top of the sections 63 asimilar flat section is proyided, and; at the bottom of the section 70 athird fiat section 78 is provided. The notches 7.4, 76, and '78 extendto a depth sufiicient for positive engagement with the projection 65} tobe fixed therein. Preferably the edges between the notches and theadjacent inclinedsections 63 and 70 respectively are rounded or.slightly inclined. The whole arm structure 30, 5.0 is. arranged to swinghorizontally; the: front end of the arm is craclgedat 31, see Figure 2,and extends into an aperture 39 in the base plate 36 so that the iesin bb arm s m ed- Under normal driving, cqnditions the driving belt 24 whichmay be of rubber or other elastic material is tightened so as to engagethe friction wheel 20 against oneof the sections 12, 1.4, or 1-6 so thatthe rotation of the motor spindle 10 is. transmitted through thefriction wheel 20, the pulley 22;, and the belt 24 to the turntable 13.

For setting the speed of the turntable the knob 64 is turned so as tolocate one'of the flat portions 74, 7.6 or 78 of the cam 61 inengagement with the projection 60. Thus, if the uppermost recess 74 isengaged with the projection 60, thepivoted arm 50 is tilted to its upperposition in which the friction wheel 20 engages the largest spindlesection 16; When it is desired to select the intermediate speed, theknob 64 is turned clockwise so as to disengage the notch 74 from theprojection 60 and turn the sleeve 32 with the projection 60 sliding downthe inclined surface 68 until it engages the notch 76. The spring 66serves to keep the arm 50in engagement with the cam portions. Furtherclockwise turning of the knob 64 and rotation of the sleeve 32 until theprojection'60 is engaged by the notch 78 cause selection of the lowestspeed when the friction wheel 20 engages the smallest spindle section 12When changing. from a lower to a higher speed, the knob 65% is ti r nedanticlockwise. In this case the projection 60 must climb the inclinedcam portions and the tension of the spring will resist such climbingwith the result that the turning of the knob and the sleeve initiallywill cause the arm structure 36, 50 to be swung anticlockwise againstthe tension of the belt 24- with the friction wheel disengaging themotor spindle to a position in which the front end of the arm 30 engagesthe edge of the aperture 39. In this position of the arm structure theprojection 60 climbs the inclined cam portion 70 to the notch '76against the action of the spring 66, and when the knob 64 is releasedwith the friction wheel 20 in the plane of the spindle section 14 thefriction wheel 20 will re-engage the spindle due to the tension of thebelt 24. A similar operation of the knob 64 will enable displacement ofthe drive so that the friction wheel is in engagement with the drivingsection 16.

From the above specification it will be understood that my inventioncomprises a driving belt having elastic properties that pass in theperipheral recess of the turntable and further pass over the drivingpulley. The driving pulley is spaced from the periphery of theturntable. Further the driving pulley is maintained substantially in theplane comprising the recess in the periphery of the turntable. The gearwheels are displaced independently of the position of the driving pulleywhich is always maintained in this plane.

By designing the driving arrangement in this manner I avoid having adriving roller engaging the flange of the turntable. According to myinvention the driving connection is the elastic belt only.

This feature has several advantages. Thus for example it is possible tolet the elasticity of the driving belt adsorb a substantial part of theirregularities so as to thereby obtain a decrease in the so-called wowwhich means the deviation from the nominal speed of the turntable.

I claim:

1. A phonograph driving arrangement for driving a phonograph turntableat a plurality of different selectable speeds including in combination:a turntable structure including a turntable having a peripheral flangeand an annular exterior recess in said flange, an electric motor havinga power spindle including a plurality of driving portions of differentdiameter, an auxiliary spindle in spaced relationship to said motorspindle, a pulley rotatably arranged on said spindle, means forretaining said pulley in a plane substantially parallel with the planethrough said turntable recess, a friction gear wheel on said auxiliaryspindle mounted for rotation thereon as well as axial displacement toassume a plurality of positions in which it is operable to selectivelyengage any one of said motor spindle driving sections, an elasticdriving belt for said turntable passing over said pulley and in saidturntable recess and operable to urge said friction gear wheel againstsaid motor spindle, a transmission between said friction gear wheel andsaid pulley operable to cause said pulley to rotate with said frictiongear wheel when driven from said motor spindle, a speed selectorarrangement comprising a speed selector member designed to be turned byhand, a speed selector spindle connected with said speed selector memberand disposed in spaced parallel relationship from said motor spindle andsaid auxiliary spindle, said speed selector spindle having a leverstructure including a swingingly arranged arm extending laterally fromsaid speed selector spindle and on which said auxiliary spindle issupported to be swung to disengage said friction gear wheel from saidmotor spindle when said speed selector spindle is turned in apredetermined direction and a lever supported to tilt vertical to saidswingingly arranged lever against resilient action and being inengagement with said friction gear wheel for axially displacing thelatter along said auxiliary spindle, a cam structure including aplurality of cam portions distributed around said speed selector spindleoperable to engage with a portion of said tiltable lever for holdingsaid tiltable lever in a selectable number of tilted positions with saidfriction gear wheel in different planes for engaging each of saiddriving portions of said motor spindle, and a plurality of inclined camportions for tilting said lever in response to turning of said speedselector spindle in said predetermined direction to cause said camengaging portion of said tiltable lever to climb said inclined portionsand in response to said climbing to cause said lever structure to beswung to disengage said friction gear wheel from said motor spindleagainst the elasticity of the driving belt.

2. A phonograph driving arrangement for driving a phonograph turntableat a plurality of different selectable speeds including in combination:a turntable structure including a turntable having a peripheral flangeand an annular exterior recess in said flange, an electric motor havinga power spindle including a plurality of driving portions of differentdiameter, an auxiliary spindle in spaced relationship to said motorspindle, a pulley rotatably arranged on said spindle, means. forretaining said pulley in a plane substantially parallel with the planethrough said turntable recess, a friction gear wheel on said auxiliaryspindle mounted for rotation thereon as well as axial displacement toassume a plurality of positions in which it is operable to selectivelyengage any one of said motor spindle driving sections, an elasticdriving belt for said turntable passing over said pulley and in saidturntable recess and operable to urge said friction gear wheel againstsaid motor spindle, a transmission between said friction gear wheel andsaid pulley operable to cause said pulley to rotate with said frictiongear wheel when driven from said motor spindle, an arm supporting saidauxiliary spindle and arranged to swing to move said auxiliary spindleaway from said rnotor spindle to disengage said friction gear wheeltherefrom, a pivotable arm arranged to swing together with saidswingingly arranged arm as well as to tilt in a direction perpendicularthereto and having a portion in operative connection with said frictiongear wheel for displacing the latter axially on said auxiliary spindlein response to tilting of said pivotable arm, a cam arrangementincluding a cam member having a plurality of portions operable to swingboth said arms as well as to tilt said pivotable arm, and a plurality ofportions operable to hold said pivotable arm in a plurality of tiltedpositions, in each of which said friction gear wheel is disposed forbeing engaged against a selected one of said driving spindle portionscaused by the tension of said elastic belt, and a member designed to beturned by hand in a predetermined direction for rendering said camarrangement operative to swing said arms to disengage said friction gearwheel from said driving spindle against the tension of said elastic beltand to shift said pivotable arm to assume a predetermined one of itstilted positions.

3. A phonograph driving arrangement for driving a phonograph turntableat a plurality of different selectable speeds including in combination:a turntable structure including a turntable having a flange and anannular exterior recess in said flange, an electric motor having a powerspindle including a plurality of driving portions of difierent diameter,an auxiliary spindle in spaced parallel relationship to said motorspindle, a pulley rotatably arranged on said spindle in a planesubstantially parallel with the plane through said turntable recess, anelastic driving belt for said turntable passing over said pulley in saidturntable recess and operable to urge said friction gear wheel againstsaid motor spindle, a rotatably arranged gear wheel on said auxiliaryspindle in driving connection with said pulley and mounted for axialdisplacement to assume a plurality of positions in which it is operableto selectively engage any one of said motor spindle driving sections, asupporting structure for said auxiliary spindle movable to swing saidauxiliary spindle away from said motor spindle to disengage saidfriction gear wheel therefrom, and including a pivotable arm arranged totilt and being in operative connection with rsaid friction gear wheelfor displacing the latter axially on said auxiliary spindle when tilted,a cam arrangement including a cam member having a plurality of portionsoperable to swing said supporting structure'and to tilt said pivotablearm and a plurality of tilted positions in each of which said frictiongear wheel is disposed for being engaged against a selected one of saiddriving spindle portions caused by the tension of said elastic belt, anda member designed to be turned by hand in a predetermined direction forrendering said cam arrangement operative to swing said supportingstructure to disengage said friction gear wheel from said drivingspindle against the tension of said elastic belt and to shift said camsto said pivotable arm to assume a predetermined one of its tiltedpositions.

4. A phonograph driving arrangement for driving a phonograph turntableat a plurality of different selectable speeds including in combination:a turntable structure including a turntable having a flange and anannular exterior recess in said flange, an electric motor having a powerspindle including a plurality of driving portions of diiferent diameter,an auxiliary spindle in spaced parallel relationship to said motorspindle, a pulley rotatably arranged on said spindle in a planesubstantially parallel with the plane through said turntable recess, anelastic driving belt for said turntable passing over said pulley in saidturntable recess and operable to urge said friction gear wheel againstsaid motor spindle, a rotatably arranged gear wheel on said auxiliaryspindle in driving connection with said pulley and mounted for axialdisplacement to assume a plurality of positions in which it is operableto selectively engage any one of said motor spindle driving sections,means supporting said auxiliary spindle operable to swing it away fromsaid motor spindle to disengage said friction gear wheel therefrom, apivotable lever arranged to tilt and in operative connection with saidfriction gear wheel for displacing the latter axially on said auxiliaryspindle, a cam arrangement operable to swing said supporting means andto tilt said pivotable lever between a plurality of positions in each ofwhich said friction gear wheel is disposed for being engaged against aselected one of said driving spindle portions and a control memberdesigned to be turned by hand in a predetermined direction for renderingsaid cam arrangement operative to swing said supporting structure todisengage said friction gear wheel from said driving spindle and toshift said pivotable lever to assume a selected one of its tiltedpositions.

5. A phonograph driving arrangement for driving a phonograph at aplurality of different selectable speeds including in combination: aturntable having a depending flange in which an annular exterior recessis provided, an electric motor having a power spindle including aplurality of driving portions of different diameter, an auxiliaryspindle in spaced parallel relationship to said motor spindle, a pulleyrotatably supported on said spindle retained in a plane substantiallyparallel with the plane through said turntable recess, a friction gearwheel supported for rotation and axial displacement on said auxiliaryspindle and in driving connection with said pulley, means supportingsaid auxiliary spindle and operable to move said auxiliary spindle awayfrom said motor spindle, means operable to displace said friction gearwheel axially on said auxiliary spindle, a cam arrangement including acam member having a plurality of portions operable upon rotation toactuate said means to swing said auxiliary spindle away from said motorspindle and to displace said friction gear wheel axially on saidauxiliary spindle, and a plurality of portions operable to hold saidfriction gear wheel displacing means in a plurality of positions in eachof which said friction gear wheel is disposed for being engaged againsta selected one of said driving spindle portions, an elastic driving beltpassing over said pulley and said turntable flange recess operable toswing said supporting -means against said d motor spindle to causedriving'engagementbetween said motor spindle and said friction gearwheel, and a member adapted to be turned by hand in a predetermineddirection for rotating said cam member.

6. In a phonograph driving arrangement in combination: a turntablehaving a flange including an annular exterior recess, a motor having adriving spindle including a plurality of driving portions of differentdiameter, a driven structure in spaced relationship to said motorspindle and including a pulley rotatably retained in a planesubstantially parallel with the'plane through said turntable recess, anda friction gear Wheel in driving connection with said pulley and mountedfor rotation as well as axial displacement along said motor spindle toassume a plurality of positions in each of which it is operable toengage one of said motor spindle driving sections to be driventherefrom, an elastic driving belt for said turntable passing over saidpulley and in said turntable recess, an arm structure supporting saiddriven structure including a pivotable member operable to displace saidfriction gear wheel axially, manually operable control means for tiltingsaid pivotable member, and means for retaining said pivotable member ina plurality of positions with said friction gear wheel in position to bedriven from each of said motor spindle portions.

7. In a phonograph driving arrangement in combination: a turntablehaving a flange including an annular exterior recess, a motor having adriving spindle including a plurality of driving portions of differentdiameter, a driven structure in spaced relationship to said motorspindle and including a pulley rotatably retained in a planesubstantially parallel with the plane through said turntable recess, anda friction gear wheel in driving connection with said pulley and mountedfor rotation as well as axial displacement along said motor spindle toassume a plurality of positions in each of which it is operable toengage one of said motor spindle driving sections to be driventherefrom, an elastic driving belt for said turntable passing over saidpulley and in said turntalble recess, an arm structure supporting saiddriven structure including a pivotable member operable to displace saidfriction gear wheel axially, manually operable control means for tiltingsaid pivotable member, including a spring load on said pivotable memberand a cam structure operable to pivot said member between a plurality ofpositions in each of which said friction gear wheel is in operativeposition to engage one of said motor spindle portions to be driventhereby, said cam structure further being operable to disengage saiddriven structure from said motor spindle when shifting said frictionwheel between a section of smaller diameter and a section of largerdiameter.

8. In a phonograph driving arrangement for driving a phonographturntable at a plurality of diflerent selectable speeds and including anelectric motor having a driving spindle with a plurality of portions ofdifferent diameter to be selectively engaged by a shiftable driven gearwheel which is in driving connection with said turntable, theimprovement that said shiftable gear wheel is in driving connection withan intermediate gear wheel mounted to rotate with said friction gearwheel and retained in a predetermined plane with a portion of saidturntable which is provided with an exterior annular recess and that anelastic driving belt passes over said pulley and said turntable guidedin the annular recess in said turntable portion and operates to-urgesaid friction gear wheel into driving engagement with said motorspindle, and that further shifting means-for said friction gear Wheel isprovided including a manually operable speed selector member adapted tobe turned, a. cam arrangement turning with said speed selector memberand'having inclined portions as well as flat portions, an auxiliarymounting structure for said friction gear wheel and said pulley,including a member operable to displace said gear wheel by engagementwith said inclined portions and position said gear wheel to selectivelyengage each of said driving spindle portions by the engagement of eachof said flat cam portions, said supporting structure further including amember movable in response to resistance against the climbing of saidfirst member up said inclined cam portions to cause said friction gearwheel to be disengaged from said motor spindle during its displacement.

9. In a phonograph driving arrangement for driving a phonograph at aplurality of different selectable speeds and including an electric motorhaving a driving spindle with a plurality of portions of differentdiameter to be selectively engaged by a shiftable driven gear Wheelwhich is in driving connection with said turntable, the improvement thatsaid shiftable gear wheel is in driving connection with an intermediategear Wheel mounted to rotate with said friction gear wheel and retainedin a predetermined plane with a portion of said turntable which isprovided with an exterior annular recess and that an elastic drivingbelt passes over said pulley and said turntable guided in the annularrecess in said turntable portion and operates to urge said friction gearwheel into driving engagement with said motor spindle, and that furthershifting means for said friction gear wheel is provided including amanually operable speed selector member adapted to be turned, a shiftingarrangement for said shiftable gear wheel turning with said speedselector member including a mounting structure for said friction gearwheel and said pulley, means operable to shift the position of said gearwheel in response to turning of said selector member, and means operableto move said friction gear wheel to be disengaged from said motorspindle during its shifting.

10. In a phonograph driving arrangement for driving a phonographturntable at a plurality of different selectable speeds to be selectedby turning a speed selector knob, and including an electric motor havinga driving spindle with a plurality of portions of different diameter tobe selectively engaged by a driven gear wheel operatively connected tobe shifted by turning said selector knob and which is in drivingconnection with said turntable, the improvement that said shiftable gearwheel is in driving connection with an intermediate gear wheel mountedto rotate with said friction gear wheel and retained in a predeterminedplane with a portion of said turntable which is provided with anexterior annular recess and that an elastic driving belt passes oversaid pulley and said turntable guided in the annular recess in saidturntable portion and operates to urge said friction gear wheel intodriving engagement with said motor spindle, and that said shiftingconnection between said friction gear wheel and said speed selector knobincludes a cam member movable with said speed selector knob, meanscooperating with said cam member for shifting said gear wheel and fortemporarily disengaging it from said motor spindle when shifted from alower to a higher speed.

11. In a phonograph driving arrangement for driving a phonographturntable at a plurality of diflierent selectable speeds to be selectedby turning a speed selector knob, and including an electric motor havinga driving spindle with a plurality of portions of different diameter tobe selectively engaged by a driven gear wheel operatively connected tobe shifted by turning said selector knob and which is in drivingconnection with said turntable, the improvement that said shiftable gearwheel is in driving connection with an intermediate gear wheel mountedto rotate with said friction gear Wheel and retained in a predeterminedplane with a portion of said turntable which is provided with anexterior annular recess and that an elastic driving lbelt passes oversaid pulley and said turntable guided in the annular recess in saidturntable portion and operates to urge said friction gear wheel intodriving engagement with said motor spindle.

12. In a phonograph driving arrangement for driving a phonographturntable at a plurality of different selectable speeds and including anelectric motor having a driving spindle, a driven member in drivingconnection with said turntable, a shiftable driven gear member operableto drive said driven member, and manual means for shifting said gearmember to be driven from said motor spindle at a plurality of differentspeeds the improvement that a pulley is mounted to rotate with saiddriven member and mounted to rotate therewith in a predetermined planewith a portion of said turntable which is provided with an exteriorannular recess, and that an elastic driving belt passes over said pulleyand said turntable guided in the annular recess in said turntableportion and operates to urge said gear member into driving engagementwith said motor spindle.

13. In a phonograph driving arrangement for driving a phonograph at aplurality of different selectable speeds the combination with anelectric motor having a driving spindle and a shiftable driven geararrangement having a part in driving connection with said turntable theimrovement that said shiftable gear arrangement includes a driven pulleymounted for rotation in a predetermined plane, that said turntable has aportion including an exterior annular recess in the plane of saidpulley, and that an elastic driving belt passes over said pulley andsaid turntable guided in the annular recess in said turntable portion.

14. A phonograph driving arrangement comprising a turntable having asubstantially flat disc-shaped portion and a flange extendingsubstantially perpendicular to said disc-shaped portion and an annularrecess in said flange, a power driven spindle having a plurality ofdriving sections of different diameters, a second spindle in spacedrelationship relatively to said power driven spindle, a pulley and afriction wheel mounted on said second spindie with said pulley in spacedrelationship to said turntable flange and maintained substantially inthe plane of said recess in said flange, an elastic driving beltsurrounding said turntable and said pulley passing over said pulley andpassing in said recess of said fiange of said turntable, said pulley andsaid friction wheel be ing mounted on said spindle by means preventingrelative rotation of said pulley and said wheel, said means allowing alongitudinal displacement of said friction Wheel along said secondspindle, and speed setting means operable at will having a plurality ofpredetermined positions for setting said friction wheel in any one of aplurality of predetermined positions along said spindle, in which saidfriction wheel is capable of engaging one of said driving sections ofsaid power driven spindle to thereby drive said turntable at a selectedone of a plurality of predetermined speeds.

15. A phonograph driving arrangement comprising: a turntable having asubstantially fiat disc-shaped portion and a flange extendingsubstantially perpendicular to said disc-shaped portion and an annularrecess in said flange, a power driven spindle having a plurality ofdriving sections of difierent diameters, a second spindle in spacedrelationship relatively to said power driven spindle, a pulley and afriction Wheel mounted on said second spindie with said pulley in spacedrelationship to said turntable flange and maintained substantially inthe plane of said recess in said flange, an elastic driving beltsurrounding said turntable and said pulley passing over said pulley andpassing in said recess of said flange of said turntable, said pulley andsaid friction wheel being moun ed on said spindle by means preventingrelative rotation of said pulley and said wheel, said means allowing alongitudinal displacement of said friction wheel only along said secondspindle to displace said friction wheel to alternately engage any one ofsaid plurality of driving sections of said power driven spindle tothereby drive said turntable at a plurality of predetermined speeds.

16. A phonograph driving mechanism for driving a phonograph turntable ata plurality of predetermined speeds comprising: a turntable structureincluding a spindle, a disc-shaped portion and a flange portion having aperipheral recess, a power unit structure including a driving spindlehaving a plurality of driving sections of dilferent diameter, a spindlesubstantially parallel with said driving spindle and remote from saidturntable pei iphery, a pulley on said spindle located substantially ina plane comprising said recess on the periphery of said turntable, afriction wheel longitudinally displaceable along said spindle to assumea plurality of predete'rmined positions in which it engages any one ofsaid plurality of driving sections of different diameter of said fn'otorspindle, an elastic belt passing in said peripheral recess on saidturntable and further passing over said driving pulley said elastic beltbeing tensioned to keep said displaceable friction wheel in engagementwith any one of said driving sections, and means for shifting saidfriction wheel for selectively driving said pulley from each of saidplurality of motor spindle sections.

17. A phonograph driving mechanism for driving a phonograph turntable ata plurality of predetermined speeds comprising: a turntable structureincluding a spindle, a disc-shaped portion and a flange portion having aperipheral exterior recess, a power unit structure including a drivingspindle having a plurality of driving sections of different diameter, aspindle substantially parallel with said driving spindle and remote fromsaid turntable periphery, a pulley on said spindle located substantiallyin a plane comprising said recess on the periphery of said turntable, afriction wheel longitudinally displaceable along said spindle to assumea plurality of predetermined positions in each of which it engages anyone of said plurality of driving sections of different diameter of saidmotor spindle, an elastic belt passing in said peripheral recess on saidturntable and further passing over said driving pulley, and means forshifting said friction wheel for driving said pulley at a plurality ofpredetermined speeds.

18. A phonograph driving mechanism for driving a phonograph turntable ata plurality of predetermined speeds comprising: a turntable having aspindle and an annular recess, a motor having a driving spindle, aspindle having a driving pulley substantially parallel with said motorspindle and in spaced relationship to the periphery of said turntable,an elastic driving belt passing in said peripheral recess of saidturntable and further passing over said driving pulley, means formaintaining said pulley substantially in a plane comprising said annularrecess of said turntable, and driving means including variable gearmeans for driving said pulley from said motor spindle at a plurality ofpredetermined speeds.

19; A phonograph driving arrangement comprising: a turntable having aflange extending substantially perpendicular to the turntable and anexterior annular recess in said flange, a driving pulley in spacedrelationship to said turntable and maintained substantially in the planeof said recess in said flange, an elastic driving belt surrounding saidturntable and said pulley passing over said pulley and passing in saidrecess of said flange of said turntable, a power driven spindle fordriving said pulley and having a plurality of driving sections eachassigned to a different speed, a friction wheel interposed between saidpower driven spindle and said pulley, and arranged to be engaged againstsaid driving spindle, and means operable at will to displace saidfriction wheel to alternately engage any one of said driving sections ofsaid driving spindle to thereby drive said turntable at a plurality ofpredetermined speeds.

References Cited in the file of this patent UNITED STATES PATENTS2,381,079 Pittman Aug. 7, 1945 2,585,460 Halahan Feb. 12, 1952 2,801,546Scheller Aug. 6, 1957 FOREIGN PATENTS 1,031,063 France June 19, 19531,071,735 France Sept. 3, 1954 526,126 Canada June 12, 1956

